package com.example.demo.niuke;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

/**
 * @Author: liull
 * @Description: 素数伴侣
 * @Date: Created in 15:50 2020/4/1
 * @Modified By:
 */
public class Main48 {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while ((line = br.readLine()) != null) {
            Integer i = Integer.valueOf(line);
            String s = br.readLine();
            String[] arr = s.split("\\s");
            List<String> strList = Arrays.asList(arr);
            //            strList.forEach(System.out::println);
            int count = 0;
            for (String s1 : strList) {
                strList.remove(s1);
                for (String s2 : strList) {

                }
            }
        }
    }
}
